The correct answer is C.
According to the ideas expressed in the Republic by Plato and the Politics by Aristotle, the society (polis) should be ruled by the most rational, most qualified and best members of the country, the philosopher kings in words of Plato. These philosophers, the fathers of western political philosophy, don't agree with democracy since in their view it is a distortion of a constitutional government. The government should be composed by an educated elite (aristocracy), a philosopher king (royalty), or a constitutional government (Republic). For that reason, the leader of the country, following his reason, would rule for the common good of the entire society.